First, the appearance

(1) The surface should be round and smooth, and the coating should be continuous and uniform.

(2) There should be no defects such as triangular mouth, burrs, cracks, kinks, folds, inclusions, spots, pits, mechanical wear and corrosion spots on the surface of the conductor.

(3) The color is uniform, bright, and there should be no excessive oxidation marks.

(4) The conductor cross-section is sufficient in size and does not lose weight.

Second, insulation and sheath

(1) The surface is smooth and round, the gloss is uniform, and there should be no visible sputum, bubbles, charred materials, etc.

(2) The insulation (sheath) is uniform in thickness and not eccentric.

(3) No mechanical damage and flattening

(4) There should be no adhesion between the materials of each layer.

Third, other aspects

(1) The metal shielding layer should be continuous, overlapping, tightly wrapped, not sharp, curled, leaked, etc.

(2) The cable pitch is uniform and uniform.

(3) The filling is full and the cable is rounded.

(4) The wrapping should overlap, and there should be no curling or missing.

(5) The shape of the cable should be round, without flattening, and serpentine bending.

(6) There should be no signs of moisture inside the cable.